Stenciling material.



A. B. D IGK.

STENCILING MATERIAL. APPLICATION FILED MAR. 25, 1913.

Patented June 23, 191% INVENTOR Jaw/64246 9 a M v MTORNEV UNITED STATES PATENT OFFICE. ALBERT B. DICK, or LAKE FOREST, ILLINOIS, ass-Tenor, To A. B. DICK COMPANY, or CHICAGO, ILLINOIS, A CORPGRATION OFILLINOIS.

STENCILING MATERIAL.

Specification of Letters Patent.

Patented June 23, 1914.

lpplication filed March 25, 1913; Serial No. 756,640.

To all whom it may concern:

Be it known that I, ALBERT B. Dion, a citizen of the United States, residing at Lake Forest, in the county of Lake and State of Illinois, have invented certain new- 1 Such stencil-sheets are commonly made of Yoshino fiber impregnated with coagulated protein containing an admixture of a suitable tempering ingredient. It has been proposed to combine with such a stencil-sheet a carrier-sheet of hard, firm paper, and to loosely interleave between the stencil-sheet and such carrier-sheet a backing-sheet of absorbent paper or other suitable material adapted to take up a moistening substance, such as glycerin and water. The three sheets are preferably so combined as to be capable of insertion in the typewriter as a unit, and after such insertion the type characters are impressed upon the stencil-sheet, which after drying is adapted for insertion in a duplicator for the production of multiple copies.

I have found that in the use of stenciling material as last described,'the backing-sheet loosely interleaved between the carrier-sheet and the stencil-sheet is open to objection, in that it frequently becomes wrinkled, thereby distorting the overlying stencilsheet, and moreover the stencil-sheet is liable to injury, not only while inserting the backing-sheet in position but also while applying the moistening material thereto. This is exaggerated by the tendency of the moisture itself to cause the backing-sheet to Wrinkle or become distorted. By the present invention, these objections are entirely overcome, and the operation of preparing the stencil greatly facilitated. Essentially this is due to permanently combining the carriersheet and the backing-sheet, the rear surface ofthe former being firmly bound to the front surface of the latter, so that wrinkling or buckling of the backing-sheet is precluded, whether as a result of careless handling or as a result of the application'of the moistening compound thereto.

In the accompanying drawing, the figure illustrates a three-sheet combination, such as that herein suggested, A being thestencilsheet, B the backing-sheet, preferably of soft, absorbent paper, muslin, or other suitable material, and C the carrier-sheet. The latter is preferably made of stiff, firm paper having a varnished surface, which serves the double purpose of makingthe carriersheet impervious to moisture and of acting as an adhesive for the purpose of binding the backing-sheet B firmly thereto.

The surface of the carrier-sheet is first primed with paraffin and then coated with the varnish, and before the varnish is dry,

the absorbent backing-sheet may be laid thereon and the combination of sheets subjected to pressure, during which the process of drying out may continue. As a result, the backing-sheet is firmly, evenly and permanently combined with the carrier-sheet, but is still sufficiently absorptive to enable it to take up the moistening material for the purpose of moistening the stencil-sheet immediately overlying the backing-sheet.

The moistening compound which I employ as part of the present invention consists of water, glycerin and Turkey-red oil. The proportions of these several ingredients may be varied within Wide limits, but a practicable formula, for the purposes of this disclosure, is water 72%, glycerin 25%, Turkey-red oil 3%, the purpose of the last named ingredient being to maintain the.

As indicated in the drawing, I prefer to secure the attachment edge of the stencilsheet and carrier-sheet together for. con venience of handling, and since the backingsheet is permanently attached tothe carriersheet, this means that the three sheets can be manipulated as a unit. With such unitary structure, as a preliminary to the typing operation in a writing-machine, it is only necessary to lay back the stencil-sheet, apply the moistening compound to the backing-sheet, replace the stencil-sheet, and then 7 sulting in uniformity of the type characters I formed therein by the writing-machine.

Having now described my, invention, what. I claim as new therein and desire to secure by Letters Patent-is as follows 1. In stenciling material, the combination with a stencil-sheet, of acarrier-sheet and a soft absorbent backing-sheet between saidstencil-sheet and carrier-sheet, said backingsheet being secured to said carrier-sheet throughout substantially its entire expanse, substantially as set forth.

2. Instenciling material, the combination with a stencil-sheet, of a carrier-sheet having a coating rendering it impervious to ink, and a soft, absorbent backing-sheet between said stencil-sheet and carrier-sheet, said backing-sheet being secured to such carrier sheet throughout substantially its entire expanse, substantially as set forth.

4 3. 'In stenciling material, the combination I with a stencil-sheet, of a carrier sheet coated to render thesame impervious, and a soft, absorbent backing-sheet between said stencil-sheet and carrier-sheet, said backingsheet being secured to said carrier-sheet by said coating, substantially as set forth.

4. In stenciling material, the combination with a stencil sheet, of a soft, absorbent backing underlying said stencil-sheet during the stencil-cutting operation, said backing being impregnated with a moisten'ing solution containing Water, glycerin and Tur- .key-red oil, substantially as set forth. 5. In stenciling material, the combination with .a stencil-sheet, of an impervious carrier-sheet of hard, firm material, and an absorbent backing-sheet secured to said carrier-sheet throughout substantiall its entire expanse, saidba'cking-sheet being m0istened by a solution containin water, glycerin and Turkey-red oil, su stantially asset forth. I

This specification signed and witnessed this 21st day of March, 1913.

Witnesses: v

H. H. MEEHAN, U. G. CASE.

AL ER fB-D K; f 

